mirror of
https://github.com/matrix-org/dendrite
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72285b2659
Sister PR to https://github.com/matrix-org/gomatrixserverlib/pull/364 Read this commit by commit to avoid going insane.
98 lines
3.6 KiB
Go
98 lines
3.6 KiB
Go
package internal
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import (
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"context"
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"fmt"
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"time"
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"github.com/matrix-org/dendrite/federationapi/api"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/matrix-org/gomatrixserverlib/spec"
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"github.com/matrix-org/util"
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)
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// QueryJoinedHostServerNamesInRoom implements api.FederationInternalAPI
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func (f *FederationInternalAPI) QueryJoinedHostServerNamesInRoom(
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ctx context.Context,
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request *api.QueryJoinedHostServerNamesInRoomRequest,
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response *api.QueryJoinedHostServerNamesInRoomResponse,
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) (err error) {
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joinedHosts, err := f.db.GetJoinedHostsForRooms(ctx, []string{request.RoomID}, request.ExcludeSelf, request.ExcludeBlacklisted)
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if err != nil {
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return
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}
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response.ServerNames = joinedHosts
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return
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}
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func (a *FederationInternalAPI) fetchServerKeysDirectly(ctx context.Context, serverName spec.ServerName) (*gomatrixserverlib.ServerKeys, error) {
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ctx, cancel := context.WithTimeout(ctx, time.Second*30)
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defer cancel()
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ires, err := a.doRequestIfNotBackingOffOrBlacklisted(serverName, func() (interface{}, error) {
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return a.federation.GetServerKeys(ctx, serverName)
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})
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if err != nil {
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return nil, err
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}
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sks := ires.(gomatrixserverlib.ServerKeys)
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return &sks, nil
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}
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func (a *FederationInternalAPI) fetchServerKeysFromCache(
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ctx context.Context, req *api.QueryServerKeysRequest,
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) ([]gomatrixserverlib.ServerKeys, error) {
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var results []gomatrixserverlib.ServerKeys
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for keyID, criteria := range req.KeyIDToCriteria {
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serverKeysResponses, _ := a.db.GetNotaryKeys(ctx, req.ServerName, []gomatrixserverlib.KeyID{keyID})
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if len(serverKeysResponses) == 0 {
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return nil, fmt.Errorf("failed to find server key response for key ID %s", keyID)
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}
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// we should only get 1 result as we only gave 1 key ID
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sk := serverKeysResponses[0]
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util.GetLogger(ctx).Infof("fetchServerKeysFromCache: minvalid:%v keys: %+v", criteria.MinimumValidUntilTS, sk)
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if criteria.MinimumValidUntilTS != 0 {
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// check if it's still valid. if they have the same value that's also valid
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if sk.ValidUntilTS < criteria.MinimumValidUntilTS {
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return nil, fmt.Errorf(
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"found server response for key ID %s but it is no longer valid, min: %v valid_until: %v",
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keyID, criteria.MinimumValidUntilTS, sk.ValidUntilTS,
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)
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}
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}
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results = append(results, sk)
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}
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return results, nil
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}
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func (a *FederationInternalAPI) QueryServerKeys(
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ctx context.Context, req *api.QueryServerKeysRequest, res *api.QueryServerKeysResponse,
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) error {
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// attempt to satisfy the entire request from the cache first
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results, err := a.fetchServerKeysFromCache(ctx, req)
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if err == nil {
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// satisfied entirely from cache, return it
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res.ServerKeys = results
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return nil
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}
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util.GetLogger(ctx).WithField("server", req.ServerName).WithError(err).Warn("notary: failed to satisfy keys request entirely from cache, hitting direct")
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serverKeys, err := a.fetchServerKeysDirectly(ctx, req.ServerName)
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if err != nil {
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// try to load as much as we can from the cache in a best effort basis
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util.GetLogger(ctx).WithField("server", req.ServerName).WithError(err).Warn("notary: failed to ask server for keys, returning best effort keys")
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serverKeysResponses, dbErr := a.db.GetNotaryKeys(ctx, req.ServerName, req.KeyIDs())
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if dbErr != nil {
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return fmt.Errorf("notary: server returned %s, and db returned %s", err, dbErr)
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}
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res.ServerKeys = serverKeysResponses
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return nil
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}
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// cache it!
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if err = a.db.UpdateNotaryKeys(context.Background(), req.ServerName, *serverKeys); err != nil {
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// non-fatal, still return the response
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util.GetLogger(ctx).WithError(err).Warn("failed to UpdateNotaryKeys")
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}
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res.ServerKeys = []gomatrixserverlib.ServerKeys{*serverKeys}
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return nil
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}
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